You do realize that weapon speed has absolutely no effect on the GCD, thus no effect on the speed at which you can Devastate or Shield Slam, right? In general, we'd appreciate it if you had some clue what you were talking about before posting. Thanks.

Original Post:

Do you honestly consider having to press HS once every 1.6 secs compared to once every 2.6 secs a different playstyle? I don't, which is why I don't see a point in using fast weapons over the vastly superior slow ones.

You have sword and board. You just used Shield Slam, then a devastate (procing S & , following up with the free Shield Slam. With a 1.5 speed, this can happen very, very fast. With a 2.6, the refresh of your shield slam cooldown takes even longer.